Long Ridge Road is a north/south route in Stamford. It begins at Cold Spring Road (CT 137) and runs north, parallel to and west of High Ridge Road (CT 137), to the border with New York, where is changes designation to become Westchester CR 3. It is a four-lane undivided road south of the Merritt Parkway (CT 15) and a two-lane undivided road north of it.